Steven heitler



March 22, .1927; 1,621,668

s; HEITLER HEATER Filed July so, 1924 2 sheets-sheet 1 I; 3g w INVENTOR 5mm 366x12 ATTORNEY Patented Mar. 22, 1927.

UNITED STATES STEVEN HEITLER, OF NEW YORK, N. Y.

HEATER.

Application filed. July 30,

This invention relates to hot water heaters such as are used in supplying hot water to houses, apartments or dwellings generally.

The invention has for an object the provision of a novel typeof hot water heater equipped with means for cutting off the heat supply when the heater starts generating steam in any large quantities.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawing is a side elevation of my improved heater, certain parts being broken away.

Fig.2 is a central vertical sectional view thereof.

Fig. 3 is a plan view.

Fig. 4: is a fragmentary side elevational view showing the burner control means.

Fig. 5 is a detail vertical sectional view of the means for shutting off the gas supply when steam is being generated in the boiler.

Fig. 6 is a fragmentary horizontal sectional view taken on the line 66 of Fig. 2.

Fig. 7 is a detail vertical sectional view of the removable top stove elements. 1

Fig. 8 is a side elevational View showing a modified type of heat supplying device.

As here embodied my improved heater comprises an upright cylindrical. casing 10 having extending axially therethrough a comparatively large flue ortube 12 this tube being open at its ends, which are joined to the. top and bottom members 10 and 10 of the casing. An annular hot water boiler is thus provided. This boiler is provided at its upper end with an inlet connection 13. The casing 10 seats at its lower end on a cylindrical stand 14:, the latter having fixed to its inner face a number of angular brackets 15 on which the casing rests, this stand enclosing the burner regulating devices. This stand is provided with a sliding door 16.

In the embodiment of the invention shown in Figs. 1 and 2 of the drawing I provide a gas burner for heating the water in the boiler. This burner is here in the form of a number of parallel tubes 18 that extend through the flue 12, these tubes being formed with suitable orifices for the escape of gas,

1924. Serial No. 729,139.

these orifices being spaced along the tubes. The tubes are fixed at their lower ends on a hollow head 19 that fits snugly in the lower end of the flue 12, this head 19 being formed integral with a central tube 20 that has the usual type of connection with a gas supply pipe 21, the latter having a hand. valve 22 thereon;

The other end ofv pipe 21 communicates with a port 25 in the side of a vertically elongated valve casing 26 to the lower. end of which a pipe 27 leading from the gas supply, is connected. The port 25 is located in the side of the valve casing just above a seat 28 in the latter. Slidable in the upper end of the casing is a plunger valve 29 whose lower end constitutes a valve that is adapted to engage the seat 28 at certain times to shut off the gas from the burner. The upper part of this plunger valve is in the form of a diminished neck 30 that passes through an opening in a cap 31 screwed on the upper end of the casing 26. Surrounding this neck 30, and bearing between the cap 31 and an enlarged head 32 on the upper end of the plunger, is a coiled expansion spring 33 that normally retains the plunger lifted from the seat 28.

The head 32 on the plunger 30 is adapted to be engaged to depress the latter, and wholly or partially close port 25, by means of an. element which is controlled by the pressure of the water in the boiler 10. This element comprises a cylindrical casing 36 that is fixed at its upper end to the bottom of the boiler and communicates with the in terior of the latter. In this casing 36 is slidably positioned an elongated piston having a diminished stem 38 formed on its lower end and projecting downward through a suitable aperture in a cap 39 fixed on the lower end of the casing as by the set screw 4.0. Surrounding this stem 38, within the casing 36 is a coiled expansion spring 41. The valve casing 26 is positioned below, and in vertical alignment with, the casing 36, while the various parts are so proportioned that when the boiler is filled with water, the

, spring 11 will be compressed to a degree to have the lower end of the stem 38 in close adj acence to the head 32 on the upper end of the plunger valve 29. If the boiler starts generating steam in any large quantity the pressure of the water on the piston 37 will increase, causing the latter to move down against the pressure of spring 41, and thereby imp-art like movement to the valve 29 with a coiiseq'uent cutting oil, or diminishing of the supply of gas to the burner. In order to provide for proper lubrication of the piston 37 a tube 44 leads from a grease cup of ordinary type to a port 4:6 in the side of the casing 36, this port re istering with a circumferential groove 4;? in the piston '37 when the latter is in normal position.

To facilitate ignition 'ot the burner 1 pros vide a pilot burner on the upper end of a small tube 51 that istappedoil-the pipe 27, this burner being inside the lower end of the flue 1:2. The pipe 51 is provided with an ordinary hand valve 52 which may be set to any desired position.

In connection with my improved hot water heaterll preferably provide an attachment whereby the waste heat-natty be utilized for cooking purposes. 'Cllhis attachment comprises a short pipe 55 of adiameter to fit snugly in the flue l2 and that is formed on its lower end with bayonet slots 56 to engage pins 57 in the upper end of the line to support the attachment in place. Upon the upper end of this pipe is a hollow pam 58 having a flat top on whichartioles may be placed. As here shown the pan supports a removable oven 59 provided with a suitable door. The pan 58 is formed around its edges with upwardly projecting members 60 that serve to con-fine the oven against displacement and has suitable outlet openings for the hot gases at its. edges. The boiler 10 is provided with a safety valve 62, a pressure gauge 63, and a water gauge 6%, the glass of the latter being protected by a metal sheathing. A drip cook is also provided at the bottom of the boiler.

When the part just described is not in use the top of the flue may be closed, wholly or partially by a device consisting of a pair of relatively rotatable disks 66 and 67 having openings such as 68 therein.

Instead of the gas burner I 'may provide an electrical heater such as shown in Fig. 8 and comprising- 21 number or coils 70 mounted on a suitable frame 71 and arranged for insertion in the flue, the frame having a circular projection 72 that engages the "bottom of the flue. The circuit to the heater coils icludes a pair of noi' ma-lly closed contacts -73 and 7 1- the latterot which is adapted to be engagedat certain times "by one end of a lever 7 5 that is tirlerumed between its ends as at 76 and whose other end engages in an opening 77 in the stem 88.

As indicated in Fig. 2 I may provide in the boiler 10 an elongated member 85 of a weight corresponding to that of Walter and having a stem 85 on its lower end that restson thetop oit the piston 37 the member extending substantially the full height of the boiler and being guided for free vertical movement by the parts 87;.

It'the boiler is full of water the latter entirely supports the member 85 which correspondinglyexei'ts no'load on the piston 37, 'which will therefore act only as the steam pressure within the boiler changes to increase or diminish the amount of gas led to the burn-er, while it the water falls in the boiler, the weight of the member 85 rests increasingly on the piston 3:7 corresponding to the full height orwater originally in the boiler, so that the piston 37 will act only as steam develops, irrespective ofthe height of the water in the boiler. It is readily seen that the height of the water in the boiler has no effect on a movement of the piston 37. It should be kept in mind that when the boiler is full of water the member '85 exerts no load on the piston 37; but a load is exerted 011 the pistonv due to the Water height, itsel t, and as the water height falls, the load on the piston d ne to the water height decreases, but this decrease is offset by the weight of member 85 which rests increasing-1y on the piston as the water height falls. But :as thesteam pressure changes, the downward pressure on the top ot piston 37 changes allowing the spring ll to anove piston 37 so that the downward steam pressure balances the upward pressure of the spring bl. A motion 'of piston 37 is immediately communicated to valve '29, and the amount of fuel regulated accordingly.

7 Havingthus described my invention, what I claim as new and desire to protect by Letters Patent of the United States is as follows:

1. A water heater comprising a boiler, a heat generating element, means communieating with the bottom of said boiler adapted to -be actuated by steam pressure in the boiler for controlling said heat generating element, and means tor elin'iinating the height of water in said boiler as a factor in the operation of the heat generatingelement controlling means.

2. A water heater comprising a boiler, a heat generating element, means communicating with the bottom of said boiler adapted to be actuated 'by steam pressure in the boiler for controlling said heat generating element, andmeans-comprising an elongated ns-ember of a specifie gravity corresponding to that pt water located in the boiler, and resting freely on an operative member of said heat generating element controlling means, substantially as shown and described, fo-reliminating :the height of water in said boiler asa tactoriinthe operation of the heat generating element controlling means.

3; A waterheater coni'prising a boiler, a heat generating element, means communicating with the bottomot' said boiler adapted to be actuated by steam pressure in the tially as shown and described, for elimiboiler for controlling said heat generating nating the height of Water in said boiler as 10 element, and means comprising an elongated a factor in the operation of the heat genmember of a specific gravity corresponding erating element controlling means.

to that of Water located in the boiler, slidably In testimony whereof I have alfixed my supported by members and resting freely signature.

on an operative member of said heat generating element controlling means; substan- STEVEN HEITLER. 

